JP2573425B2 - Circuit breaker energization display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker energization display device for displaying whether a voltage is applied to terminal fittings of a main circuit of the circuit breaker.

[0002]

2. Description of the Related Art Conventionally, in a circuit breaker provided for protection against overcurrent or protection against leakage, whether or not a voltage is applied to terminal fittings of a main circuit is confirmed by an indicator lamp. Is thought to be. For example, it has been considered to connect a terminal plate connected to an indicator lamp to a terminal fitting together with an external connection conductor connected to a load of a main circuit or a power supply. By the way, it is common to use terminal fittings with terminal screws for circuit breakers, so if the terminal plate for the indicator light and the external connection conductor to the load or power supply are fixed with one terminal screw, the connection work Cannot be performed independently, and the operation becomes troublesome, and the connection state of the external connection conductor of the main circuit becomes low in reliability.

In order to solve such a problem, the present inventors provided a cover 1 fitted to the body of a circuit breaker as shown in FIG. The present invention has devised an energization display device in which one end portion of the display device 2 is elastically connected to a terminal fitting and the other end portion is connected to the terminal plate 4 of the indicator lamp 3. In this energization display device, a column 5 protruding from the cover 1 is fitted into the other end of the energization spring 2, and a terminal groove 4 is formed in a hooking groove formed on the peripheral surface of the column 5 along the circumferential direction.
And a substantially U-shaped notch formed in the groove. Therefore, the terminal plate 4 is fixed to the column 5 by engaging with the hook groove of the column 5, and the energizing spring 2 is
Will be electrically connected to the That is, since one end of the energizing spring 2 is in elastic contact with the terminal fitting, the indicator lamp 3 and the terminal fitting are electrically connected.

In this configuration, the indicator lamp can be connected to the terminal fitting without affecting the connection state of the external connection conductor of the main circuit to the terminal fitting, so that the connection work of the indicator light is facilitated. This has the advantage that the reliability of the connection state of the external connection conductor is not reduced.

[0005]

However, since the terminal plate 4 connected to the indicator light 3 is only fitted in the catch groove of the column 5, there is a problem that it is relatively easy to fall off. Therefore, it is considered that the peripheral wall 1a protruding in the same direction as the column 5 is formed on the cover 1, and after the terminal plate 4 is engaged with the hooking groove, the terminal plate 4 is prevented from falling off by the peripheral wall 1a. Can be

However, to achieve this goal,
Since it is necessary to make the dimension from the surface of the cover 1 facing the terminal fitting to the tip of the peripheral wall 1a larger than the dimension up to the hook groove, the hook is held in a state where the terminal plate 4 is inclined with respect to the support column 5. Since the terminal board 4 is fitted in the groove, it becomes difficult to mount the terminal plate 4 in the hook groove. That is, there is a problem that the assembling work becomes difficult.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and to facilitate the work of mounting a terminal plate connected to an indicator lamp in a hooking groove to improve the assemblability of a circuit breaker. It is intended to provide a display device.

[0008]

According to the first aspect of the present invention, in order to achieve the above object, a circuit breaker is fitted into a recess formed at a corner of an outer surface of a body of a circuit breaker and having a terminal fitting disposed therein. Cover, an energizing spring composed of a conductive coil spring in which a support protruding from a surface of the cover facing the terminal fitting is fitted into one end and the other end elastically contacts the terminal fitting, and a peripheral surface of the support An indicator light that is electrically connected to the main circuit via a terminal plate having a substantially U-shaped cutout groove that fits into a hooking groove formed along the circumferential direction, and that is turned on when power is supplied to the main circuit. In the energization display device of the circuit breaker, a peripheral wall protruding in the same direction as the column along the corner of the body is formed in the vicinity of the column in the cover, and is formed from the surface of the cover facing the terminal fitting to the tip of the peripheral wall. The dimensions are set larger than the dimensions up to the catch groove, The surface facing the wall in the pillar, at the site of the tip side of the strut at least hooking groove is what is in the notch so that the distance from the peripheral wall is greater than the opposing part between the inner bottom surface and the peripheral wall of the hook groove.

According to a second aspect of the present invention, a linear locking piece is extended along the inner bottom surface of the cover at one end of the energizing spring on the support column side, and the locking piece abuts on the inner bottom surface of the cover. That is, a locking projection is provided to stop the rotation.

[0010]

According to the first aspect of the present invention, the surface of the pillar facing the peripheral wall is at least a portion near the tip of the pillar from the hooking groove, and is more distant from the peripheral wall than the portion facing the inner bottom surface of the hooking groove and the peripheral wall. Is notched so that it becomes larger, so that the distance between the center of the support and the peripheral wall is set relatively small enough to prevent the terminal plate from coming off, but when the terminal plate is inserted into the hook groove, For the part where the tip abuts on the support, the distance between the peripheral wall and the opposing surface of the support can be made relatively large, and the terminal plate can be easily inclined with respect to the support, so that the terminal Mounting work can be facilitated.

According to the second aspect of the present invention, the locking piece is extended on the power supply spring and the locking projection is provided on the cover so as to stop the rotation of the power supply spring. The rotation of the current-carrying spring can be stopped simply by fitting the current-carrying spring into the cover by fitting into the spring.

[0012]

As shown in FIGS. 2 and 3, an operation handle 11 is provided at the center of the upper surface of a body 10 of a circuit breaker, and recesses 12 are formed at both corners of the body 10. Have been. Each recess 12 is divided into three sections by a partition 13, and terminal fittings 20 are arranged in each section. In addition, screw holes 14 are formed at key points on the upper surface of the partition 13.

The terminal fitting 20 includes a terminal plate 21 fixed to the body 10 and a terminal screw 23 having a metal fitting 22 screwed to the terminal plate 21. The terminal plate 21 is connected to the main circuit, and an external connection conductor such as a crimp terminal for connection to a power supply or a load is provided between the terminal plate 21 and the metal plate 22 by tightening the terminal screw 23. Be pinched.

By the way, an energization display device A is mounted on a portion corresponding to the recess 12. The energization display device A is
2 is provided with a cover 1 for covering the upper surface thereof, and an indicator light 3 for displaying electricity is attached to the cover 1. Partition wall 13 in cover 1
A support base 6 protrudes from a surface facing the upper surface of the cover 1, and a through hole 6 a is formed in the cover 1 at a portion corresponding to the support base 6. When the fixing screw 7 inserted into the through hole 6a from above is screwed into the screw hole 14, the cover 1
It is fixed to 0.

The cover 1 has three corners along the corner of the body 10.
A peripheral wall 1a protrudes from the side. In addition, the three terminal fittings 20 on the surface of the cover 1 facing the terminal fittings 20.
A column 5 is protruded from a portion corresponding to two of them. Further, the indicator light 3 is attached to a portion of the cover 1 that is separated from the body 10, and a mounting cylinder 8 is formed at a portion where the indicator light 3 is attached.

Each of the columns 5 is fitted into one end of a current-carrying spring 2 formed of a conductive material and functions as a spring seat. The other end of the energizing spring 2 is electrically connected to the terminal fitting 20 by elastically contacting the terminal fitting 20. As shown in FIG. 1, the support 5 has a terminal fitting 2 on the cover 1.
A hooking groove 5a is formed at a position where the distance from the surface facing the zero is smaller than the distance to the tip of the peripheral wall 1a. A substantially U-shaped cutout groove 4a of the terminal plate 4 connected to the indicator light 3 via the connection line 3a is fitted into the hook groove 5a.
A hooking projection 4b is formed near the opening of the notch groove 4a, and when the terminal plate 4 is mounted on the hooking groove 5a, the hooking projection 4b is engaged with the hooking groove 5a, so that the terminal plate 4 is prevented from coming off. It is like that. As described above, when the terminal plate 4 is mounted on the column 5, the energizing spring 2 comes into contact with the terminal plate 4.
Are electrically connected.

The terminal plate 4 is inserted into the column 5 from the center piece of the substantially U-shaped peripheral wall 1a. Therefore, in a state where the terminal plate 4 is mounted on the column 5, if the terminal plate 4 is to be pulled out from the column 5, the terminal plate 4 comes into contact with the peripheral wall 1 a, and the terminal plate 4 is hard to come off. A notch 5b is formed on the surface of the support 5 on the side where the terminal plate 4 is inserted. That is, in FIG. 1, a cutout portion 5 b is formed in a portion facing the peripheral wall 1 a from the hooking groove 5 a to the upper end of the column 5, in which the notch portion 5 b is cut out to the depth of the hooking groove 5 a. Therefore, as shown in FIG.
When inserted in an obliquely inclined state with respect to, the distance between the support post 5 and the peripheral wall 1a can be made longer than before,
This facilitates the work of inserting the terminal plate 4. Further, once the terminal plate 4 is mounted on the column 5, the column 5 and the peripheral wall 1 a have the same dimensional relationship with the terminal plate 4 as in the related art. It is.

At the end of the energizing spring 2 on the side of the cover 1, a linear locking piece 2 a is extended along the cover 1, and the cover 1 is engaged with the cover 1 at a position where it can contact the locking piece 2 a. A stop projection 9 is provided in a protruding manner. Accordingly, the rotation of the energizing spring 2 is prevented by the engagement of the locking piece 2 a with the locking protrusion 9.

[0019]

As described above, according to the first aspect of the present invention, the surface of the strut facing the peripheral wall is at least a portion near the tip of the strut from the hooking groove and the inner bottom surface of the hooking groove faces the peripheral wall. Notched so that the distance from the peripheral wall is larger than the part, so while setting the distance between the center of the support and the peripheral wall relatively small enough to prevent the terminal plate from coming off, place the terminal plate in the hook groove For the part where the tip of the terminal plate comes into contact with the support when inserting, the distance between the opposing surfaces of the peripheral wall and the support can be made relatively large, and the terminal plate can be easily inclined with respect to the support. In addition, there is an advantage that the work of attaching the terminal plate to the hook groove can be facilitated.

According to the second aspect of the present invention, the locking piece is extended from the power supply spring and the locking projection is provided on the cover so as to stop the rotation of the power supply spring. The effect that the rotation of the current-carrying spring can be stopped simply by fitting the current-carrying spring into the cover by fitting into the spring is exerted.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing an embodiment.

FIG. 2 is an exploded perspective view showing a use state of the embodiment.

FIG. 3 is a partially cutaway side view showing a use state of the embodiment.

FIG. 4 is a sectional view of a main part of the embodiment.

FIG. 5 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover 1a Peripheral wall 2 Power supply spring 2a Locking piece 3 Indicator light 4 Terminal plate 4a Notch groove 5 Prop 5a Hooking groove 5b Notch 9 Locking projection 10 Body 12 recess 20 Terminal fitting

Claims (2)

(57) [Claims] 1. A cover formed at a corner of an outer surface of a body of a circuit breaker and fitted in a recess in which a terminal is disposed, and a cover protruding from a surface of the cover facing the terminal. An energizing spring made of a conductive coil spring whose one end is fitted into one end and the other end elastically contacts the terminal fitting, and a substantially U-shaped fitting which is fitted into a catch groove formed along the circumferential direction on the peripheral surface of the support. A power indicator for a circuit breaker, which is electrically connected to the main circuit through a terminal plate having a notch groove and is lit while the power to the main circuit is energized; A peripheral wall protruding in the same direction as the column along the corner of the body is formed, and a dimension from a surface of the cover facing the terminal fitting to a tip of the peripheral wall is set to be larger than a dimension up to the hook groove, and a peripheral wall of the column is formed. The opposing surface of at least the support groove An energization display device for a circuit breaker, characterized in that it is cut off at a portion near the front end so that the distance from the peripheral wall is larger than a portion where the inner bottom surface of the hook groove and the peripheral wall face each other. 2. A linear locking piece extends along one inner end of the cover at one end of the energizing spring on the support column side, and the locking piece contacts the inner bottom surface of the cover to stop rotation of the energizing spring. 2. The power supply indicating device for a circuit breaker according to claim 1, wherein a locking projection is provided so as to protrude.